A linear 23-residue peptide reveals a propensity to form an unusual native-like conformation

Simon A. Sherman, William H. Gmeiner, Leonid Kirnarskiy, Fulvio Perini, Raymond W. Ruddon

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


To gain insight into the earliest events of protein folding, a 23-residue peptide with a sequence corresponding to the 38-60 fragment of the β-subunit of human chorionic gonadotropin (hCGβ) was studied by NMR. In aqueous solution the majority of the peptide residues adopted an extended polyproline II (Pn) conformation similar to those in mature, fully folded hCGβ. The finding that the isolated protein fragment may acquire native-like structural motifs, even without α-helices or β-structures, extends the possibility of using free peptides as model systems to better understand the protein folding mechanisms. It was shown that the PII-rich structural motif can be determined efficiently by NMR spectroscopy. The observation that in the absence of extensive medium-and long-range interactions the majority of amino acid residues may adopt the PIIconformation suggests that the PII-rich structural motifs may play an important role in early events of protein folding.

Original languageEnglish (US)
Pages (from-to)441-446
Number of pages6
JournalJournal of Biomolecular Structure and Dynamics
Issue number3
StatePublished - Dec 1995

ASJC Scopus subject areas

  • Structural Biology
  • Molecular Biology


Dive into the research topics of 'A linear 23-residue peptide reveals a propensity to form an unusual native-like conformation'. Together they form a unique fingerprint.

Cite this